|Mesoscale Discussion 697|
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Mesoscale Discussion 0697
NWS Storm Prediction Center Norman OK
0242 PM CDT Sun Jun 10 2018
Areas affected...East-Central IL...West-Central IN
Concerning...Severe Thunderstorm Watch 168...
Valid 101942Z - 102115Z
The severe weather threat for Severe Thunderstorm Watch 168
SUMMARY...Threat for damaging wind gusts and perhaps a tornado or
two continues across east-central IL. Downstream threat across
west-central IN will likely merit the issuance of another watch
DISCUSSION...MCS moving across central IL has recently exhibited an
increase in forward motion, likely as a result of increased forward
propagation into the warm, moist, and inhibition-free airmass
downstream. New storm development as also occurred ahead of the
line, increasing the probability for continued forward propagation.
Current storm motion is estimated as 310 degrees at 35 kt. Northern
portion of the line appears to be moving a little faster (i.e.
closer to 40 kt). This southeastward progression will likely take
the northern portion of the line to the edge of Severe Thunderstorm
Watch 168 by 20Z. Downstream airmass across west-central/southern IN
remains favorable for continued MCS progression and downstream watch
will likely be needed soon.
One other item of note is the increased southeasterly winds in place
immediately along the warm front draped from near CMI southward into
far southwest IN. Resulting localized enhancement of the low-level
shear may contribute to brief tornado potential.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 40108999 40648848 40668734 40258643 39168623 38728650
38608719 38628771 38758858 39118956 40108999
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